44.0 mm replacement piston with two 1.5 mm rectangular piston rings with internal fuse (IS) for the 44 mm racing cylinder for your Tomos S25/2, A38B and A35 moped / moped.
The detailed dimensions of the piston according to the technical drawing can be found in the details. In addition, you can find out about the relevant piston rings, their positions and locking types on the legend in the pictures.
The piston kit contains piston pins, piston clips and piston rings.
You will find the corresponding assembly tool, piston pin locks and, if necessary, the corresponding cylinder in the accessories section.
Good, inexpensive standard spare part. GPO – GOOD PARTS ONLY.
Manufacturer | GPO |
Nominal diameter | 44 mm |
Ø outside piston (A) | 43.96 mm |
Ø piston pin (B) | 12 mm |
Compression height (C) | 21.9 mm |
Curvature (D) | 4.15 mm |
Total piston height (E) | 49.55 mm |
Number of piston rings (F) | 2 pcs |
Piston ring mold | Rectangular ring |
Piston ring impact | Internal fuse (IS) |
Piston ring height | 1.5 mm |
Tomos |
Accessories & related products
GPO piston pin extractor Ø 10, 12, 14 mm
Surface: burnished · Manufacturer: GPO · Material: Steel · Diameter: 10 mm · Diameter: 12 mm · Diameter: 14 mm · Area of application: (Dis)assembly tool · Number of components: 7 pcs · Total length: 130 mm · Width across flats SW: 10 mm · Width across flats SW: 17 mm
CHF 19.90
GPO 44 mm cylinder kit tuning 12 mm KoBo | Tomos A35
Manufacturer: GPO · Material: Aluminum · Camouflaged: No · Area of application: Tuning · Nominal diameter: 44 mm · Displacement: 65 ccm · Crankshaft stroke: 43 mm · Ø piston pin (B): 12 mm · Ø cylinder neck: 47.8 mm · Surface: sandblasted · Ø outlet inside: 22.8 mm · Hole spacing inlet: 36 mm · Hole spacing inlet: 39 mm · Inlet window: 35.5 x 29.5 · Thread inlet: M5x0.8 (standard thread) · Hole spacing outlet: 42 mm · Hole pattern [mm]: 44 x 44 · Outlet type: slanted · Number of fixing points: 4 pcs · Thread outlet: M6x1 (standard thread) · Decompressor: No
CHF 89.90
Moped fans also bought
NTN 6203 C3 Ball bearing 17/40/12
Surface: blank · Bearing cage: "-" Sheet steel cage ball-guided · Stock number: 6203 · Inner ring width: 12 mm · Manufacturer: NTN · Bearing clearance: C3 · Groove ring: No · Material: Steel · Ø outside: 40 mm · Bearing type: Deep groove ball bearing · Area of application: Standard · Width: 12 mm · Ø inside: 17 mm · Ball bearing closed: No
CHF 8.90
Motorex engine oil (gear oil) manual 450 ml
Manufacturer: Motorex · Viscosity (SAE): 80W · Area of application: Gearbox lubrication with clutch · Oil type: GL4 · Contents [ml]: 450 ml · Gearbox type: Foot control · Gearbox type: Manual gearshift · Temperature resistance (min.): -30 - 220 °C
CHF 9.90
CHF 22.00/l
swiing® revival nozzle set M5 (70 - 92) Dell'Orto SHA, PHBG
Manufacturer: swiing® revival parts · Material: Brass · Component group Carburetor: Spraying · Carburetor type: PHBG · Carburetor type: SHA · Carburetor type: SHA (Piaggio) · Quantity: 10 pcs · Nozzle type: Main nozzle · Total length: 8 mm · Nozzle thread: M5x0.8 (standard thread) · Nozzle size: 70 · Nozzle size: 72 · Nozzle size: 75 · Nozzle size: 78 · Nozzle size: 80 · Nozzle size: 82 · Nozzle size: 85 · Nozzle size: 88 · Nozzle size: 90 · Nozzle size: 92 · Drive: Slot
CHF 20.90
EBR telescopic fork "Jumpy" silver (P4510) | Pony GTX wide screen & Beta 521
Surface: chrome-plated · Surface: varnished · Manufacturer: EWC · Material: Aluminum · Material: Steel · Adjustable: Yes · Color: Chrome · Color: black · Color: silver · Spar end distance (center-center): 150 mm · Ø outer head tube: 25.5 mm · Ø head tube inside: 21.5 mm · Ø spars: 28 mm · Head tube length: 225 mm · Thread type: FG25.4 (1" 24G) · Fork bridge - center wheel axle: 410 mm · Distance brake cam to wheel axle center-center: 38 mm · Total length: 670 mm · Thread length: 58 mm
CHF 299.90
DMP 44 mm cylinder head (higher compression) | Tomos
Surface: glass bead blasted · Manufacturer: DMP · Material: Aluminum · Area of application: Racing · Area of application: Tuning · Width: 145 mm · Height: 66 mm · Total length: 145 mm · Ø cylinder: 44 mm · Hole pattern [mm]: 44 x 44 · Candle thread: short · Ø screw holder: 8 mm · Number of fixing points: 4 pcs
CHF 59.90